class_docstr: Python data source backed by Python objects: length and __getitem__.
code: def __getitem__(self, i: int) -> Any:
      return self.getitem(i)
  
file_path: datasets/tensorflow_datasets/core/data_sources/python.py
imports: from __future__ import annotations
  from collections.abc import MappingView, Sequence
  import dataclasses
  from typing import Any, Callable
label_desc: Use image node_id 3 for calling the PythonDataSource obj's underlying member method code with example usage: obj.__getitem__(i) and returns: self